I already have the Leftovers from the one in that garbage can below the Village Bridge.
The thing is, l have several walls, and it's inefficient and annoying to share my one Leftovers with about eight Pokemon.

Does anyone else know a way, or has found another Leftovers in Black and White?

*l have already checked the Battle Subway, no Leftovers there.
Also, l don't want an answer telling me to start another game, and transferring that Leftovers to my current game.